McQs in Optics and RefractionThis text comprises a selection of carefully chosen questions based on the Optics and Refraction module of the Royal College of Ophthalmologists examinations. For each of the 60 questions a short informative answer is supplied. |
Common terms and phrases
20 dioptre lens A-F B-T C-F A-T B-T accommodation angle alpha angle kappa angle of incidence anisometropia anterior chamber aperture aphakia astigmatism axial axis B-T C-F D-T back vertex distance base curve base-out prism Captoptric images chromatic aberration concave lens contact lens correction convergence excess convex lens crystalline lens cyclopentolate cylindrical D-T E-T degrees deviation diffraction dioptre base-up prism diplopia effective power enlarges the retinal equivalent esotropia F D-F E-T F D-T F the image focal line Galilean telescope horizontal human eye hypermetropic image displacement indirect ophthalmoscopy intraocular lens inverted Javal-Schiötz keratometer keratometry licence requires Maddox rod magnification microtropia myopes myopic astigmatism neutralised nodal point objective lens optical centre overcome phoropter pinhole posterior presbyopia principal meridians prism dioptre prism in front prismatic power Prisms A.
B.
C.
D.
E. produces an erect reading segment reduced refractive index retinal image retinoscopy retinoscopy reflex spectacle correction spectacle lenses stereopsis toric trial frame visual acuity